[Bug 1877633] Re: libseccomp 2.4.3 (and 2.4.2) is not correctly resolving (at least) the getrlimit syscall on arm64

[Alex Murray]

Verified on focal using the following procedure - full log attached as
well:

# install seccomp
$ apt install seccomp

# try resolving getrlimit for aarch64
$ scmp_sys_resolver -a aarch64 getrlimit
-10180

# on the current focal version this fails to resolve correctly and
returns -10180

# enable -proposed
$ cat <<EOF >/etc/apt/sources.list.d/ubuntu-$(lsb_release -cs)-proposed.list
# Enable Ubuntu proposed archive
deb http://archive.ubuntu.com/ubuntu/ $(lsb_release -cs)-proposed restricted main multiverse universe
EOF

# update libseccomp2 and seccomp from -proposed
$ apt install seccomp/$(lsb_release -cs)-proposed libseccomp2/$(lsb_release -cs)-proposed

# verify the installed version number is as expected from -proposed
$ dpkg -l seccomp libseccomp2

# try resolving getrlimit on aarch64 again
$ scmp_sys_resolver -a aarch64 getrlimit
163


** Attachment added: "libseccomp-focal-proposed-test.log"
   https://bugs.launchpad.net/ubuntu/+source/libseccomp/+bug/1877633/+attachment/5382704/+files/libseccomp-focal-proposed-test.log

** Tags removed: verification-needed-focal
** Tags added: verification-done-focal

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https://bugs.launchpad.net/bugs/1877633

Title:
  libseccomp 2.4.3 (and 2.4.2) is not correctly resolving (at least) the
  getrlimit syscall on arm64

Status in libseccomp package in Ubuntu:
  Fix Released
Status in libseccomp source package in Focal:
  Fix Committed
Status in libseccomp source package in Groovy:
  Fix Released

Bug description:
  This was reported via the snapcraft forum[1]:

  On bionic amd64, libseccomp 2.4.1-0ubuntu0.18.04.2

  $ lsb_release -d
  Description:	Ubuntu 18.04.4 LTS
  $ scmp_sys_resolver -a aarch64 163
  getrlimit
  $ scmp_sys_resolver -a aarch64 getrlimit
  163

  focal amd64, libseccomp 2.4.3-1ubuntu1 -- *__BROKEN__*

  $ lsb_release -d
  Description:	Ubuntu 20.04 LTS
  $ scmp_sys_resolver -a aarch64 163
  UNKNOWN
  $ scmp_sys_resolver -a aarch64 getrlimit
  -10180

  [1]https://forum.snapcraft.io/t/getrlimit-blocked-by-seccomp-on-focal-
  arm64/17237/8

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